Download (BID) Specification - Operating Systems Group

B.3
Statements
B.3.8
B
tristate /prompt/
CONFIGURATION LANGUAGE
/symbol/
This verb displays /prompt/ to the user, accepts a value from the user, and assigns that value to /symbol/.
Legal values are ”n”, ”m”, or ”y”.
The value ”m” stands for ”module”; it indicates that /symbol/ should be built as a kernel module. The value
”m” is legal only if the symbol CONFIG MODULES currently has the value ”y”.
The tristate verb does not have a default value.
Configure:
implemented
Menuconfig: implemented
Xconfig:
implemented
mconfig:
implemented
Example:
# fs/Config.in
tristate ’NFS filesystem support’ CONFIG_NFS_FS
B.3.9
define bool
/symbol/
/word/
This verb the value of /word/ to /symbol/. Legal values are ”n” or ”y”.
For compatibility reasons, the value of ”m” is also legal, because it will be a while before
define tristate is implemented everywhere.
Configure:
implemented
Menuconfig: implemented
Xconfig:
implemented
mconfig:
implemented
Example:
# arch/alpha/config.in
if [ "$CONFIG_ALPHA_GENERIC" = "y" ]
then
define_bool CONFIG_PCI y
define_bool CONFIG_ALPHA_NEED_ROUNDING_EMULATION y
fi
B.3.10
define hex
/symbol/
/word/
This verb assigns the value of /word/ to /symbol/. Any hexadecimal number is a legal value.
Configure:
implemented
Menuconfig: implemented
Xconfig:
implemented
mconfig:
implemented
Example:
# Not from the corpus
bool ’Specify custom serial port’ CONFIG_SERIAL_PORT_CUSTOM
if [ "$CONFIG_SERIAL_PORT_CUSTOM" = "y" ]; then
hex ’Serial port number’ CONFIG_SERIAL_PORT
else
define_hex CONFIG_SERIAL_PORT 0x3F8
fi
46